playwright-mcp/README.md
Ryan Malloy d8202f6694 feat: implement centralized artifact storage with session isolation
Add comprehensive artifact storage system with session-specific directories:

- Add --artifact-dir CLI option and PLAYWRIGHT_MCP_ARTIFACT_DIR env var
- Create ArtifactManager class for session-specific artifact organization
- Implement ArtifactManagerRegistry for multi-session support
- Add tool call logging with JSON persistence in tool-calls.json
- Update screenshot, video, and PDF tools to use centralized storage
- Add browser_configure_artifacts tool for per-session control
- Support dynamic enable/disable without server restart
- Maintain backward compatibility when artifact storage not configured

Directory structure: {artifactDir}/{sessionId}/[artifacts, videos/, tool-calls.json]

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-08-15 06:42:16 -06:00

31 KiB

Playwright MCP

A Model Context Protocol (MCP) server that provides browser automation capabilities using Playwright. This server enables LLMs to interact with web pages through structured accessibility snapshots, bypassing the need for screenshots or visually-tuned models.

Key Features

  • Fast and lightweight. Uses Playwright's accessibility tree, not pixel-based input.
  • LLM-friendly. No vision models needed, operates purely on structured data.
  • Deterministic tool application. Avoids ambiguity common with screenshot-based approaches.

Requirements

  • Node.js 18 or newer
  • VS Code, Cursor, Windsurf, Claude Desktop, Goose or any other MCP client

Getting started

First, install the Playwright MCP server with your client.

Standard config works in most of the tools:

{
  "mcpServers": {
    "playwright": {
      "command": "npx",
      "args": [
        "@playwright/mcp@latest"
      ]
    }
  }
}

Install in VS Code Install in VS Code Insiders

Claude Code

Use the Claude Code CLI to add the Playwright MCP server:

claude mcp add playwright npx @playwright/mcp@latest
Claude Desktop

Follow the MCP install guide, use the standard config above.

Cursor

Click the button to install:

Install MCP Server

Or install manually:

Go to Cursor Settings -> MCP -> Add new MCP Server. Name to your liking, use command type with the command npx @playwright/mcp. You can also verify config or add command like arguments via clicking Edit.

Gemini CLI

Follow the MCP install guide, use the standard config above.

Goose

Click the button to install:

Install in Goose

Or install manually:

Go to Advanced settings -> Extensions -> Add custom extension. Name to your liking, use type STDIO, and set the command to npx @playwright/mcp. Click "Add Extension".

LM Studio

Click the button to install:

Add MCP Server playwright to LM Studio

Or install manually:

Go to Program in the right sidebar -> Install -> Edit mcp.json. Use the standard config above.

Qodo Gen

Open Qodo Gen chat panel in VSCode or IntelliJ → Connect more tools → + Add new MCP → Paste the standard config above.

Click Save.

VS Code

Click the button to install:

Install in VS Code Install in VS Code Insiders

Or install manually:

Follow the MCP install guide, use the standard config above. You can also install the Playwright MCP server using the VS Code CLI:

# For VS Code
code --add-mcp '{"name":"playwright","command":"npx","args":["@playwright/mcp@latest"]}'

After installation, the Playwright MCP server will be available for use with your GitHub Copilot agent in VS Code.

Windsurf

Follow Windsurf MCP documentation. Use the standard config above.

Configuration

Playwright MCP server supports following arguments. They can be provided in the JSON configuration above, as a part of the "args" list:

> npx @playwright/mcp@latest --help
  --allowed-origins <origins>  semicolon-separated list of origins to allow the
                               browser to request. Default is to allow all.
  --artifact-dir <path>        path to the directory for centralized artifact
                               storage with session-specific subdirectories.
  --blocked-origins <origins>  semicolon-separated list of origins to block the
                               browser from requesting. Blocklist is evaluated
                               before allowlist. If used without the allowlist,
                               requests not matching the blocklist are still
                               allowed.
  --block-service-workers      block service workers
  --browser <browser>          browser or chrome channel to use, possible
                               values: chrome, firefox, webkit, msedge.
  --caps <caps>                comma-separated list of additional capabilities
                               to enable, possible values: vision, pdf.
  --cdp-endpoint <endpoint>    CDP endpoint to connect to.
  --config <path>              path to the configuration file.
  --device <device>            device to emulate, for example: "iPhone 15"
  --executable-path <path>     path to the browser executable.
  --headless                   run browser in headless mode, headed by default
  --host <host>                host to bind server to. Default is localhost. Use
                               0.0.0.0 to bind to all interfaces.
  --ignore-https-errors        ignore https errors
  --isolated                   keep the browser profile in memory, do not save
                               it to disk.
  --image-responses <mode>     whether to send image responses to the client.
                               Can be "allow" or "omit", Defaults to "allow".
  --no-sandbox                 disable the sandbox for all process types that
                               are normally sandboxed.
  --output-dir <path>          path to the directory for output files.
  --port <port>                port to listen on for SSE transport.
  --proxy-bypass <bypass>      comma-separated domains to bypass proxy, for
                               example ".com,chromium.org,.domain.com"
  --proxy-server <proxy>       specify proxy server, for example
                               "http://myproxy:3128" or "socks5://myproxy:8080"
  --save-session               Whether to save the Playwright MCP session into
                               the output directory.
  --save-trace                 Whether to save the Playwright Trace of the
                               session into the output directory.
  --storage-state <path>       path to the storage state file for isolated
                               sessions.
  --user-agent <ua string>     specify user agent string
  --user-data-dir <path>       path to the user data directory. If not
                               specified, a temporary directory will be created.
  --viewport-size <size>       specify browser viewport size in pixels, for
                               example "1280, 720"

User profile

You can run Playwright MCP with persistent profile like a regular browser (default), or in the isolated contexts for the testing sessions.

Persistent profile

All the logged in information will be stored in the persistent profile, you can delete it between sessions if you'd like to clear the offline state. Persistent profile is located at the following locations and you can override it with the --user-data-dir argument.

# Windows
%USERPROFILE%\AppData\Local\ms-playwright\mcp-{channel}-profile

# macOS
- ~/Library/Caches/ms-playwright/mcp-{channel}-profile

# Linux
- ~/.cache/ms-playwright/mcp-{channel}-profile

Isolated

In the isolated mode, each session is started in the isolated profile. Every time you ask MCP to close the browser, the session is closed and all the storage state for this session is lost. You can provide initial storage state to the browser via the config's contextOptions or via the --storage-state argument. Learn more about the storage state here.

{
  "mcpServers": {
    "playwright": {
      "command": "npx",
      "args": [
        "@playwright/mcp@latest",
        "--isolated",
        "--storage-state={path/to/storage.json}"
      ]
    }
  }
}

Configuration file

The Playwright MCP server can be configured using a JSON configuration file. You can specify the configuration file using the --config command line option:

npx @playwright/mcp@latest --config path/to/config.json
Configuration file schema
{
  // Browser configuration
  browser?: {
    // Browser type to use (chromium, firefox, or webkit)
    browserName?: 'chromium' | 'firefox' | 'webkit';

    // Keep the browser profile in memory, do not save it to disk.
    isolated?: boolean;

    // Path to user data directory for browser profile persistence
    userDataDir?: string;

    // Browser launch options (see Playwright docs)
    // @see https://playwright.dev/docs/api/class-browsertype#browser-type-launch
    launchOptions?: {
      channel?: string;        // Browser channel (e.g. 'chrome')
      headless?: boolean;      // Run in headless mode
      executablePath?: string; // Path to browser executable
      // ... other Playwright launch options
    };

    // Browser context options
    // @see https://playwright.dev/docs/api/class-browser#browser-new-context
    contextOptions?: {
      viewport?: { width: number, height: number };
      // ... other Playwright context options
    };

    // CDP endpoint for connecting to existing browser
    cdpEndpoint?: string;

    // Remote Playwright server endpoint
    remoteEndpoint?: string;
  },

  // Server configuration
  server?: {
    port?: number;  // Port to listen on
    host?: string;  // Host to bind to (default: localhost)
  },

  // List of additional capabilities
  capabilities?: Array<
    'tabs' |    // Tab management
    'install' | // Browser installation
    'pdf' |     // PDF generation
    'vision' |  // Coordinate-based interactions
  >;

  // Directory for output files
  outputDir?: string;

  // Directory for centralized artifact storage with session-specific subdirectories
  artifactDir?: string;

  // Network configuration
  network?: {
    // List of origins to allow the browser to request. Default is to allow all. Origins matching both `allowedOrigins` and `blockedOrigins` will be blocked.
    allowedOrigins?: string[];

    // List of origins to block the browser to request. Origins matching both `allowedOrigins` and `blockedOrigins` will be blocked.
    blockedOrigins?: string[];
  };
 
  /**
   * Whether to send image responses to the client. Can be "allow" or "omit". 
   * Defaults to "allow".
   */
  imageResponses?: 'allow' | 'omit';
}

Centralized Artifact Storage

The Playwright MCP server supports centralized artifact storage for organizing all generated files (screenshots, videos, and PDFs) in session-specific directories with comprehensive logging.

Configuration

Command Line Option:

npx @playwright/mcp@latest --artifact-dir /path/to/artifacts

Environment Variable:

export PLAYWRIGHT_MCP_ARTIFACT_DIR="/path/to/artifacts"
npx @playwright/mcp@latest

MCP Client Configuration:

{
  "mcpServers": {
    "playwright": {
      "command": "npx",
      "args": [
        "@playwright/mcp@latest",
        "--artifact-dir",
        "./browser-artifacts"
      ]
    }
  }
}

Features

When artifact storage is enabled, the server provides:

  • Session Isolation: Each MCP session gets its own subdirectory
  • Organized Storage: All artifacts saved to {artifact-dir}/{session-id}/
  • Tool Call Logging: Complete audit trail in tool-calls.json
  • Automatic Organization: Videos saved to videos/ subdirectory

Directory Structure

browser-artifacts/
└── mcp-session-abc123/
    ├── tool-calls.json              # Complete log of all tool calls
    ├── page-2024-01-15T10-30-00.png # Screenshots
    ├── document.pdf                 # Generated PDFs
    └── videos/
        └── session-recording.webm   # Video recordings

Tool Call Log Format

The tool-calls.json file contains detailed information about each operation:

[
  {
    "timestamp": "2024-01-15T10:30:00.000Z",
    "toolName": "browser_take_screenshot",
    "parameters": {
      "filename": "login-page.png"
    },
    "result": "success",
    "artifactPath": "login-page.png"
  },
  {
    "timestamp": "2024-01-15T10:31:15.000Z", 
    "toolName": "browser_start_recording",
    "parameters": {
      "filename": "user-journey"
    },
    "result": "success"
  }
]

Per-Session Control

You can dynamically enable, disable, or configure artifact storage during a session using the browser_configure_artifacts tool:

Check Current Status:

browser_configure_artifacts

Enable Artifact Storage:

{
  "enabled": true,
  "directory": "./my-artifacts"
}

Disable Artifact Storage:

{
  "enabled": false
}

Custom Session ID:

{
  "enabled": true,
  "sessionId": "my-custom-session"
}

Compatibility

  • Backward Compatible: When --artifact-dir is not specified, all tools work exactly as before
  • Dynamic Control: Artifact storage can be enabled/disabled per session without server restart
  • Fallback Behavior: If artifact storage fails, tools fall back to default output directory
  • No Breaking Changes: Existing configurations continue to work unchanged

Standalone MCP server

When running headed browser on system w/o display or from worker processes of the IDEs, run the MCP server from environment with the DISPLAY and pass the --port flag to enable HTTP transport.

npx @playwright/mcp@latest --port 8931

And then in MCP client config, set the url to the HTTP endpoint:

{
  "mcpServers": {
    "playwright": {
      "url": "http://localhost:8931/mcp"
    }
  }
}
Docker

NOTE: The Docker implementation only supports headless chromium at the moment.

{
  "mcpServers": {
    "playwright": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "--init", "--pull=always", "mcr.microsoft.com/playwright/mcp"]
    }
  }
}

You can build the Docker image yourself.

docker build -t mcr.microsoft.com/playwright/mcp .
Programmatic usage
import http from 'http';

import { createConnection } from '@playwright/mcp';
import { SSEServerTransport } from '@modelcontextprotocol/sdk/server/sse.js';

http.createServer(async (req, res) => {
  // ...

  // Creates a headless Playwright MCP server with SSE transport
  const connection = await createConnection({ browser: { launchOptions: { headless: true } } });
  const transport = new SSEServerTransport('/messages', res);
  await connection.sever.connect(transport);

  // ...
});

Tools

Core automation
  • browser_click
    • Title: Click
    • Description: Perform click on a web page
    • Parameters:
      • element (string): Human-readable element description used to obtain permission to interact with the element
      • ref (string): Exact target element reference from the page snapshot
      • doubleClick (boolean, optional): Whether to perform a double click instead of a single click
      • button (string, optional): Button to click, defaults to left
    • Read-only: false
  • browser_close
    • Title: Close browser
    • Description: Close the page
    • Parameters: None
    • Read-only: true
  • browser_configure
    • Title: Configure browser settings
    • Description: Change browser configuration settings like headless/headed mode, viewport size, user agent, device emulation, geolocation, locale, timezone, color scheme, or permissions for subsequent operations. This will close the current browser and restart it with new settings.
    • Parameters:
      • headless (boolean, optional): Whether to run the browser in headless mode
      • viewport (object, optional): Browser viewport size
      • userAgent (string, optional): User agent string for the browser
      • device (string, optional): Device to emulate (e.g., "iPhone 13", "iPad", "Pixel 5"). Use browser_list_devices to see available devices.
      • geolocation (object, optional): Set geolocation coordinates
      • locale (string, optional): Browser locale (e.g., "en-US", "fr-FR", "ja-JP")
      • timezone (string, optional): Timezone ID (e.g., "America/New_York", "Europe/London", "Asia/Tokyo")
      • colorScheme (string, optional): Preferred color scheme
      • permissions (array, optional): Permissions to grant (e.g., ["geolocation", "notifications", "camera", "microphone"])
    • Read-only: false
  • browser_configure_artifacts
    • Title: Configure artifact storage
    • Description: Enable, disable, or configure centralized artifact storage for screenshots, videos, and PDFs during this session. Allows dynamic control over where artifacts are saved and how they are organized.
    • Parameters:
      • enabled (boolean, optional): Enable or disable centralized artifact storage for this session
      • directory (string, optional): Directory path for artifact storage (if different from server default)
      • sessionId (string, optional): Custom session ID for artifact organization (auto-generated if not provided)
    • Read-only: false
  • browser_console_messages
    • Title: Get console messages
    • Description: Returns all console messages
    • Parameters: None
    • Read-only: true
  • browser_drag
    • Title: Drag mouse
    • Description: Perform drag and drop between two elements
    • Parameters:
      • startElement (string): Human-readable source element description used to obtain the permission to interact with the element
      • startRef (string): Exact source element reference from the page snapshot
      • endElement (string): Human-readable target element description used to obtain the permission to interact with the element
      • endRef (string): Exact target element reference from the page snapshot
    • Read-only: false
  • browser_evaluate
    • Title: Evaluate JavaScript
    • Description: Evaluate JavaScript expression on page or element
    • Parameters:
      • function (string): () => { /* code / } or (element) => { / code */ } when element is provided
      • element (string, optional): Human-readable element description used to obtain permission to interact with the element
      • ref (string, optional): Exact target element reference from the page snapshot
    • Read-only: false
  • browser_file_upload
    • Title: Upload files
    • Description: Upload one or multiple files
    • Parameters:
      • paths (array): The absolute paths to the files to upload. Can be a single file or multiple files.
    • Read-only: false
  • browser_handle_dialog
    • Title: Handle a dialog
    • Description: Handle a dialog
    • Parameters:
      • accept (boolean): Whether to accept the dialog.
      • promptText (string, optional): The text of the prompt in case of a prompt dialog.
    • Read-only: false
  • browser_hover
    • Title: Hover mouse
    • Description: Hover over element on page
    • Parameters:
      • element (string): Human-readable element description used to obtain permission to interact with the element
      • ref (string): Exact target element reference from the page snapshot
    • Read-only: true
  • browser_list_devices
    • Title: List available devices for emulation
    • Description: Get a list of all available device emulation profiles including mobile phones, tablets, and desktop browsers. Each device includes viewport, user agent, and capabilities information.
    • Parameters: None
    • Read-only: true
  • browser_navigate
    • Title: Navigate to a URL
    • Description: Navigate to a URL
    • Parameters:
      • url (string): The URL to navigate to
    • Read-only: false
  • browser_navigate_back
    • Title: Go back
    • Description: Go back to the previous page
    • Parameters: None
    • Read-only: true
  • browser_navigate_forward
    • Title: Go forward
    • Description: Go forward to the next page
    • Parameters: None
    • Read-only: true
  • browser_network_requests
    • Title: List network requests
    • Description: Returns all network requests since loading the page
    • Parameters: None
    • Read-only: true
  • browser_press_key
    • Title: Press a key
    • Description: Press a key on the keyboard
    • Parameters:
      • key (string): Name of the key to press or a character to generate, such as ArrowLeft or a
    • Read-only: false
  • browser_recording_status
    • Title: Get video recording status
    • Description: Check if video recording is currently enabled and get recording details. Use this to verify recording is active before performing actions, or to check output directory and settings.
    • Parameters: None
    • Read-only: true
  • browser_resize
    • Title: Resize browser window
    • Description: Resize the browser window
    • Parameters:
      • width (number): Width of the browser window
      • height (number): Height of the browser window
    • Read-only: true
  • browser_select_option
    • Title: Select option
    • Description: Select an option in a dropdown
    • Parameters:
      • element (string): Human-readable element description used to obtain permission to interact with the element
      • ref (string): Exact target element reference from the page snapshot
      • values (array): Array of values to select in the dropdown. This can be a single value or multiple values.
    • Read-only: false
  • browser_snapshot
    • Title: Page snapshot
    • Description: Capture accessibility snapshot of the current page, this is better than screenshot
    • Parameters: None
    • Read-only: true
  • browser_start_recording
    • Title: Start video recording
    • Description: Start recording browser session video. This must be called BEFORE performing browser actions you want to record. New browser contexts will be created with video recording enabled. Videos are automatically saved when pages/contexts close.
    • Parameters:
      • size (object, optional): Video recording size
      • filename (string, optional): Base filename for video files (default: session-{timestamp}.webm)
    • Read-only: false
  • browser_stop_recording
    • Title: Stop video recording
    • Description: Stop video recording and return the paths to recorded video files. This closes all active pages to ensure videos are properly saved. Call this when you want to finalize and access the recorded videos.
    • Parameters: None
    • Read-only: true
  • browser_take_screenshot
    • Title: Take a screenshot
    • Description: Take a screenshot of the current page. You can't perform actions based on the screenshot, use browser_snapshot for actions.
    • Parameters:
      • raw (boolean, optional): Whether to return without compression (in PNG format). Default is false, which returns a JPEG image.
      • filename (string, optional): File name to save the screenshot to. Defaults to page-{timestamp}.{png|jpeg} if not specified.
      • element (string, optional): Human-readable element description used to obtain permission to screenshot the element. If not provided, the screenshot will be taken of viewport. If element is provided, ref must be provided too.
      • ref (string, optional): Exact target element reference from the page snapshot. If not provided, the screenshot will be taken of viewport. If ref is provided, element must be provided too.
      • fullPage (boolean, optional): When true, takes a screenshot of the full scrollable page, instead of the currently visible viewport. Cannot be used with element screenshots.
    • Read-only: true
  • browser_type
    • Title: Type text
    • Description: Type text into editable element
    • Parameters:
      • element (string): Human-readable element description used to obtain permission to interact with the element
      • ref (string): Exact target element reference from the page snapshot
      • text (string): Text to type into the element
      • submit (boolean, optional): Whether to submit entered text (press Enter after)
      • slowly (boolean, optional): Whether to type one character at a time. Useful for triggering key handlers in the page. By default entire text is filled in at once.
    • Read-only: false
  • browser_wait_for
    • Title: Wait for
    • Description: Wait for text to appear or disappear or a specified time to pass
    • Parameters:
      • time (number, optional): The time to wait in seconds
      • text (string, optional): The text to wait for
      • textGone (string, optional): The text to wait for to disappear
    • Read-only: true
Tab management
  • browser_tab_close
    • Title: Close a tab
    • Description: Close a tab
    • Parameters:
      • index (number, optional): The index of the tab to close. Closes current tab if not provided.
    • Read-only: false
  • browser_tab_list
    • Title: List tabs
    • Description: List browser tabs
    • Parameters: None
    • Read-only: true
  • browser_tab_new
    • Title: Open a new tab
    • Description: Open a new tab
    • Parameters:
      • url (string, optional): The URL to navigate to in the new tab. If not provided, the new tab will be blank.
    • Read-only: true
  • browser_tab_select
    • Title: Select a tab
    • Description: Select a tab by index
    • Parameters:
      • index (number): The index of the tab to select
    • Read-only: true
Browser installation
  • browser_install
    • Title: Install the browser specified in the config
    • Description: Install the browser specified in the config. Call this if you get an error about the browser not being installed.
    • Parameters: None
    • Read-only: false
Coordinate-based (opt-in via --caps=vision)
  • browser_mouse_click_xy
    • Title: Click
    • Description: Click left mouse button at a given position
    • Parameters:
      • element (string): Human-readable element description used to obtain permission to interact with the element
      • x (number): X coordinate
      • y (number): Y coordinate
    • Read-only: false
  • browser_mouse_drag_xy
    • Title: Drag mouse
    • Description: Drag left mouse button to a given position
    • Parameters:
      • element (string): Human-readable element description used to obtain permission to interact with the element
      • startX (number): Start X coordinate
      • startY (number): Start Y coordinate
      • endX (number): End X coordinate
      • endY (number): End Y coordinate
    • Read-only: false
  • browser_mouse_move_xy
    • Title: Move mouse
    • Description: Move mouse to a given position
    • Parameters:
      • element (string): Human-readable element description used to obtain permission to interact with the element
      • x (number): X coordinate
      • y (number): Y coordinate
    • Read-only: true
PDF generation (opt-in via --caps=pdf)
  • browser_pdf_save
    • Title: Save as PDF
    • Description: Save page as PDF
    • Parameters:
      • filename (string, optional): File name to save the pdf to. Defaults to page-{timestamp}.pdf if not specified.
    • Read-only: true